JPS62255738A - Indoor unit of air conditioner - Google Patents

Abstract

PURPOSE:To make longer the distance the air flow from an heat exchanger can travel and prevent the development of moisture condensation water by providing an auxiliary air passage route and an auxiliary blow-out opening for air which does not go through a heat exchanger to let blow out an air flow with which no heat exchange is made. CONSTITUTION:In an inside cabinet 1 of an indoor unit a blower 2, heat exchanger 4, and blow-out opening 6 are provided, and in the outside of the cabinet 1 an outer cabinet 7 is provided. The inner cabinet 1 and the outer cabinet 7 are connected by an opening section 10 to communicate both. Part of the air from the blower 2 blows out from an auxiliary blow-out opening 11. During room heating, the air flow from the auxiliary blow-out opening 11 is mixed with a high temperature air flow from the blow-out opening 6 to have a medium temperature and secures the distance of reach to eliminate temperature difference in a room. During room cooling the high temperature air flow blows through an auxiliary passage 8 and auxiliary blow-out opening 11 so that moisture condensation on the outer cabinet 7 does not occur.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an indoor unit of an air conditioner.

BACKGROUND OF THE INVENTION In recent years, many indoor units of air conditioners are mounted on the ceiling. Among them, the ceiling-embedded indoor unit has a blower 2 placed in the center of the cabinet 1, and a suction port 3 at the bottom of the blower 2, as shown in Figure 2.
A heat exchanger 4 is provided around the blower 2, and a drain pan 5 is arranged below the heat exchanger 4. Further, a blowout port 6 for blowing out the airflow that has been heat exchanged by the heat exchanger 4 is provided on the outer periphery of the suction port 3 .

Problems to be Solved by the Invention However, in the configuration as described above, during heating operation, the airflow from the outlet e is high temperature and has a small specific gravity, so it accumulates in the upper part of the room and causes damage to the upper and lower parts of the room. The temperature difference increases and comfort deteriorates. Therefore, the blowing airflow is made to blow downward as much as possible, but at this time, a short circuit occurs in which the blowing airflow is sucked into the suction port 3, resulting in a decrease in the downward blowing airflow, resulting in deterioration of comfort due to insufficient reach and high temperature. There is a problem in that the high pressure increases due to the suction of the blown airflow, resulting in a decrease in capacity and the activation of the high pressure switch, causing the heating operation to stop.

Therefore, it is usually necessary to determine the limit of downward blowing and to blow diagonally downward. However, as mentioned above, the high temperature of the blown air current causes a problem in that the temperature distribution in the upper and lower parts of the room is poor, making it cold underfoot.

On the other hand, during cooling operation, the temperature and humidity inside the ceiling are higher than indoors, so dew tends to form on the surface of the cabinet embedded in the ceiling, and this condensed water falls onto the ceiling, creating stains. It also had some problems.

In view of the above-mentioned problems, the present invention has been developed so that even if the air is blown diagonally downward during heating operation, the blown air does not accumulate in the upper part of the room and the temperature distribution in the room is uniform, improving comfort. To provide an indoor unit of an air conditioner that can prevent dew condensation on the surface of a built-in cabinet.

Means for Solving the Problems In order to solve the above problems, the indoor unit of the air conditioner of the present invention has an external cabinet placed outside the internal cabinet, and auxiliary ventilation between the internal cabinet and the external cabinet. At the same time, an opening is provided to communicate the auxiliary ventilation duct with the ventilation duct between the blower and the heat exchanger in the internal cabinet. It is equipped with an exit.

Effects The present invention has the above-described configuration, so that even if the airflow from the outlet during heating operation is blown diagonally downward, this high-temperature airflow and the low-temperature airflow sent from the blower and not heat-exchanged by the heat exchanger pass through the auxiliary ventilation path. Since the air can be blown out from the auxiliary outlet and mixed to form a medium-temperature airflow, the specific gravity of the mixed blown airflow can be slightly increased to ensure a downward reach and reduce the difference in temperature between the top and bottom of the room, improving comfort. It is intended to improve

In addition, during cooling operation, high-temperature airflow sent from the blower and not heat exchanged by the heat exchanger is blown out from the opening through the auxiliary ventilation path to the auxiliary air outlet, so the external cabinet is exposed to the high temperature and humidity atmosphere in the ceiling. This prevents dew condensation.

EXAMPLE Hereinafter, an indoor unit of an air conditioner according to an example of the present invention will be described with reference to the drawings. FIG. 1 shows a sectional view of a ceiling-embedded indoor unit according to an embodiment of the present invention. 1 is an internal cabinet installed in the ceiling, 2 is an air blower placed downward in the center of the internal cabinet, 3 is a suction port provided at the bottom of the air blower 2, and 4 is a heat exchanger installed around the air blower 2 during cooling. The evaporator serves as a condenser during heating, and 6 is a drain pan that receives dehumidified water generated in the heat exchanger 4.06 is placed at the bottom of the heat exchanger 4.
is an outlet for blowing out the air flow that has undergone heat exchange in the heat exchanger 4, and is provided adjacent to the outer periphery of the outlet 3. Reference numeral 7 denotes an external cabinet provided outside the internal cabinet 1, and forms an auxiliary ventilation passage 8 between it and the internal cabinet 1. Further, an opening 1o is provided in the internal cabinet 1 to communicate the ventilation passage 9 between the blower 2 and the heat exchanger 4 with the auxiliary ventilation passage 8, and an air outlet e is provided as an opening of the auxiliary ventilation passage 8 into the room. Adjacent auxiliary air outlet 11 is provided.

The operation of the indoor unit of the ceiling-embedded air conditioner configured as above will be explained.

The airflow sucked in from the suction port 3 is sent to the heat exchanger 4 by the blower 2, and the airflow that has been heat exchanged by the heat exchanger 4 is blown out from the blowout port 6 into the room. At the same time, part of the air flow sent from the blower 2 to the heat exchanger 4 is transmitted through the opening 1o.
It passes through the auxiliary ventilation passage 8 and is blown into the room from the auxiliary air outlet 11.

The airflow from the air outlet 6 during heating operation is a high temperature airflow heated by the heat exchanger 4, and the airflow from the auxiliary airflow outlet 11 is a low temperature airflow that does not pass through the heat exchanger 4. Further, during cooling operation, the airflow from the outlet 6 is a low-temperature airflow cooled by the heat exchanger 4, and the airflow from the auxiliary outlet 11 is a high-temperature airflow that does not pass through the heat exchanger 4.

As described above, the external cabinet 7 is arranged outside the internal cabinet 1, the auxiliary ventilation path 8 is formed between the internal cabinet 1 and the external cabinet, and the blower 2 and the heat exchanger 4 inside the internal cabinet 1 are arranged. An opening 10 is provided that communicates the ventilation passage 9 between the two and the auxiliary ventilation passage 8,
By providing the auxiliary air outlet 11 adjacent to the air outlet 6 as an opening of the auxiliary ventilation passage 8 into the room, during heating operation,
Even if the airflow from the outlet 6 is blown diagonally downward, this high-temperature airflow and the low-temperature airflow sent from the blower 2 and not heat exchanged in the heat exchanger 4 are blown out from the auxiliary outlet 11 through the auxiliary ventilation passage 8 and mixed. However, since it can be made into a medium-temperature air current,
The specific gravity of the mixed blowout airflow is slightly increased to ensure a downward reach, thereby reducing the difference in temperature between the top and bottom of the room and improving comfort. Also, during cooling operation, the blower 2
The high-temperature airflow sent from the heat exchanger 4 and not heat exchanged with the heat exchanger 4 is blown out to the auxiliary air outlet 11 through the auxiliary ventilation path 8 formed by the inner cabinet 1 and the outer cabinet 7.
External cabinet 7 in contact with the high temperature and high humidity atmosphere in the ceiling
This prevents dew condensation.

Effects of the Invention As described above, the present invention arranges an external cabinet outside the internal cabinet, forms an auxiliary ventilation path between the internal cabinet and the external cabinet, and creates an air passage between the blower in the internal cabinet and the heat exchanger. By providing an opening that communicates between the ventilation passage and the auxiliary ventilation passage, and providing an auxiliary air outlet adjacent to the air outlet as an opening of the auxiliary ventilation passage into the room, air is discharged from the air outlet during heating operation. Even if the airflow is blown diagonally downward, this high-temperature airflow is mixed with the low-temperature airflow from the auxiliary outlet to form a medium-temperature airflow that secures the downward reach and reduces the temperature difference between the top and bottom of the room, improving comfort. effective. In addition, during cooling operation, high-temperature airflow sent from the blower and not heat exchanged by the heat exchanger is blown out through the auxiliary ventilation channel to the auxiliary outlet, preventing condensation on the external cabinet that is in contact with the high temperature and humidity atmosphere in the ceiling. This has the effect of preventing condensation water from falling onto the ceiling.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an indoor unit of an air conditioner according to an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional indoor unit of an air conditioner. 1... Internal cabinet, 2... Blower, 3... Suction port, 4... Heat exchanger,
6...Air outlet, 7...External cabinet, 8...Auxiliary ventilation duct, 9...Ventilation duct, 10...Opening , 11... Auxiliary air outlet. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
figure

Claims (1)

[Claims] A suction inlet, an air blower, a heat exchanger, and an air outlet are placed inside an internal cabinet that is embedded in the ceiling, an external cabinet is placed outside this internal cabinet, and an auxiliary ventilation path is provided between this internal cabinet and the external cabinet. At the same time, an opening is provided to communicate the auxiliary ventilation path with the ventilation path between the blower and the heat exchanger in the internal cabinet, and the auxiliary airflow path adjacent to the air outlet is provided as an opening of the auxiliary ventilation path into the room. Air conditioner indoor unit with outlet.